Elastic rod for motors



E. I. A. SCHULTZ.

ELASTIC ROD FOR MOTORS.

APPLICATION FILED SEPT. 24, 1918.

1,3 ,75 Patented July 26,1921.

' GUSTIN this time consequently there exists the output of the en UNITED STATES 1 EMILE JOSEPH AUGUSTIN scirun'rz, or PARIS, FRANGEW nLAsir e Ron Fort Morons.

Application filed September 24, 1 918.

(GRANTED UNDER'THE PROVISIONS OF THE ACT 015' To all whom it may concern: 7

Be it known that I, EMI n Josnrn AU- SCHULTZ, a citizen of the Republic of France, residing in Paris, France, have invented certain new and useful Improvements in Elastic Rods for Motors, of which the following is a specification,

In the'cylinder of an internal combustion engine, when the exhaust stroke is finished, there is always an appreciable volume between the end of the cylinder and the rear face of the piston. It follows that the burnt gases are not completely evacuated so that in the following phase there is a smaller charge than high final temperature when this charge has been expanded, both results diminishing This invention relates to an elastic connecting rod formed of two parts sliding one within the other at one end and at the other ends connected respectively with the parts to be joined by the connecting rod. The chamber formed by the end of the inner part and by the walls of therouter part is so packed as to make a substantially air tight joint andcontains a spring which presses the parts apart. During thefinal part of the compression stroke and during combustion the spring is compressed and the imprisoned air is also compressed; at between the piston and the end of the cylinder a correspondingly increased cubic capacity. ()n the other hand during the exhaust period no pressure is exerted on connecting rod is fully extended, the piston traveling as closely as possible to the bottom of the cylinder and evacuating the whole of the burnt gases.

An embodiment of the invention is shown in the accompanying drawing, which rep resents an elastic connecting rod particularly useful for a rotary engine.

The part a comprising the eye b of the connecting rod is formed as a tube 0 in which is adapted to slide the other part cl of the connecting rod. movement the part (5 is a bolt 7 which extends through the tube 0. At one end of bolt comes in contact with the end 9 of the slot and stops the part c from further outward movement which may be caused by centrifugal force Specification of Lettersfatent.

there might be and a' into this chamber for the piston and the To limit the sliding. slotted to receive.

the sliding movement this and by spring it. In the Serial No., 2 5 5;5 1 3. V Martens, 1921, 4; SITAVT. L., 1313.)

inner direction the sliding movement is limited by the compression of the air confined in chamber 2' formedbetween the end of the part (Z and the bottom of the cylindrical space '0 containing the spring 7i.

In order to avoid'leakage of air, the consequence of which. would be that the parts 0 and cl would there is made a labyrinthine passage 7' in the periphery of the piece (Z in the parts of which the air expands j in succession. Furthermore, thereis aport '75 in the wall of the part c in a position corresponding with the end of the outward movement, so that the air in chamber a" is restored to atmospheric pressure in the eventof a slight loss.

l/Vhen the connecting rod is applied to a rotary engine, the chamber 2' is hermetically closed, for the oil which is introduced lubricating the rubbing surfacesis by virtue of the centrifugal force, thrown to the upper part of the chamber, so that it prevents any escape between 0 and def the aircompressed inthe lower part of the chamber 2'.

This elastic connecting rod operates as follows :During the compression phase there arrives a moment when the gases balance the forces which hold the piston rod extended. In the case of a rotary cylinder engine these forces are centrifugal force, proportional to the mass of the piston, the force of the counter-spring 7L, and the expansion. force of the air in chamber 2'. The first of thesejforces is constant when the speed is constant, the second is practically always constant but the third increases very rapidly and by virtue of the airti ht clo sure of the chamber is opposed to the force which would cause ablow or contact between the surfaces limiting the contraction of the rod. The combustion occurs and the connecting rod remains compressed butat the same time that the gases expand in the cylinder the spring it expands, returning to the crank the force which it hasstored; the next cycle then begins. The explosive force of the combustion is transmitted to the crank through the compressed air cushion, thereby avoiding shocks and vibration.

It should be noted that at the beginning of the admission owing to the extremely small volume between the piston and the end of the cylinder there is a much more energetic suction of the fresh gases than come suddenly into contact,

Patented July so, 1921."

is the case when ordinary connecting rods within the sliding ends, and packing beare used; the charge'taken in isthus in--'-- tWeen'said parts to make a substantially air 7 creased by use of the elastic connecting rod. I tight joint, the said spring being adapted with the parts respectively which are to be It is evident therefore that the devicelmto expand the connectmg rod in order to proves the specific output of the engine drive the cylinder to the extreme end of which is a great advantage in aeroplane enthe' piston during the exhaust stroke and gines. Obviously, however, the invention the said air chamber/ licing adapted by comis applicable to any internal combustion enpression of the confined air to cushion the gine and the construction maybe modified; contraction ofgthe red at the endof the in detail to suit each particular case. a compression stroke and at the moment of Having thus fully described thenature of ignition.

my invention and the best meansfI know 2. A connecting .rod according to claim oi carrylng the same into practical effect, 1,-havmg a vent port to the air, chamber in I claim :1 positionto be opened at the extreme elon- 1. In an internal combustion engine,'. a gation of the rod to admit air to replace'loss telescopic connecting rod, comprising two by leakage.-. V .v

parts adapted to slide one'within the other In Witness whereof, I 'have 'hereunto at one end, means connecting the other ends signed my name.

joined by the connecting rod, a spring be- YVitnesses: I tween the sliding ends adapted to! press Jo N F. SIMoNs,

them apart, said fr od having an air chamber 91 HENRIxCARTIER.

MILE JOSEPH AUGUSTIN SCHULTZ. 

